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Malcolm Park

Malcolm Park

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The Spindle

Expand
titlePart Details

Model Version: 9.2

Material: AISI 4130 steel, annealed at 865C

Yield Strength: 460 MPa

Validation: June 20th 2023

Image Added

Fixtures

Expand
titleFixture Info

  • Virtual wall at spindle cap face to simulate the upright

  • Cylindrical radial fixture at upright section

  • Virtual wall where end of nut would be (M24 nut)

Loading

Expand
titleGeneral Loading Information

Fx

  • + Fx acts on the inner face of the thread

    • -Fx is ignored

Fy & Fz:

  • Uses resultant force magnitude and direction on inner and outer hub sections

SET ALL FORCES TO “TOTAL” AND NOT “PER ITEM”

Loading Cases

CASE 1

Node

Fx

Fy

Fz

Fyz

Fyz angle (deg)

Outer Hub to Spindle

0

-390.415332

0

-390.415332

-90

Inner Hub to Spindle

0

2486.985332

0

2486.985332

90

CASE 2

Node

Fx

Fy

Fz

Fyz

Fyz angle (deg)

Outer Hub to Spindle

0

-8555.016

-113.004

8555.762308

89.24321875

Inner Hub to Spindle

-1080.4

10715.816

1193.404

10782.065

83.64524308

CASE 3

Node

Fx

Fy

Fz

Fyz

Fyz angle (deg)

Outer Hub to Spindle

759.92

5451.294527

-203.53533

5455.092909

-87.86173709

Inner Hub to Spindle

0

-3931.44453

963.4553297

4047.777448

-76.23024273

CASE 4

Node

Fx

Fy

Fz

Fyz

Fyz angle (deg)

Outer Hub to Spindle

0

-10937.4204

369.9563703

10943.67547

-88.06271868

Inner Hub to Spindle

-1381.27

13699.97036

-1751.22637

13811.44387

-82.71555523

CASE 5

Node

Fx

Fy

Fz

Fyz

Fyz angle (deg)

Outer Hub to Spindle

971.55

6969.427054

101.6188784

6970.16785

89.16464865

Inner Hub to Spindle

0

-5026.32705

-1073.16888

5139.616237

77.94776765

Mesh

Expand
titleMesh Info

  • Max node size at 2mm

  • Mesh control the threaded face with 0.7mm max element size

Simulation Results

Expand
titleFull Result Tables

Any section in Red is greater than the Yield Strength (460 MPa)

The part will always be oriented to show the point of max stress

Case

Max Stress (MPa)

Model

1

13.710

2

143,000.0

3

84.28

4

689,300.0

5

121.1

(cases 2 and 4 had excessive displacement errors that I said no to. -MP)

Recommendations

The Spundle seemed to break right across the axis of symmetry, as shown below

Its possible that this is an issue with the simulation parameters rather than the part.

Stainless Steel Test

case 3